Associations between microvascular function and short-term exposure to traffic-related air pollution and particulate matter oxidative potential

Table 3 Spearman correlation matrix of ambient, personal air pollutants and heat index^a

	BC	CO	NO_x	PM_2.5	O₃	Heat Index (F°)
24h averages of ambient exposures
BC (μg/m³)		0.87	0.90	0.33	−0.69	−0.27
CO (ppm)			0.90	0.27	−0.73	−0.32
NO_x (ppb)				0.20	−0.77	−0.32
PM_2.5 (μg/m³)					−0.06	0.09
O₃ (ppb)						0.54
7-day averages of personal exposure^b
Personal NO_x (ppb)	0.47	0.45	0.47	0.16	−0.43	−0.25

^aPollutants are mean-centered by region
^bCorrelations for personal NO_x were calculated with 7-day average of ambient pollutants and heat index

ISSN: 1476-069X